RFR: Clarified language around release notes [v2]

[Jesper Wilhelmsson]

> The word "note" was used to refer to a release note, a release note sub-task, and a comment in a JBS issue - this could be confusing. Made it more explicit.
> Also updated the usage of Fix version for release notes which was not described correctly.

Jesper Wilhelmsson has updated the pull request incrementally with one additional commit since the last revision:

  Update src/guide/release-notes.md
  
  Co-authored-by: Ivan Bereziuk <Navi.Bereziuk at gmail.com>

-------------

Changes:
  - all: https://git.openjdk.org/guide/pull/164/files
  - new: https://git.openjdk.org/guide/pull/164/files/49d228b7..8e7bf410

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=guide&pr=164&range=01
 - incr: https://webrevs.openjdk.org/?repo=guide&pr=164&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/guide/pull/164.diff
  Fetch: git fetch https://git.openjdk.org/guide.git pull/164/head:pull/164

PR: https://git.openjdk.org/guide/pull/164